Furnace attachment



March 24, 1925. 1,531,126

J. D. OBRIEN FURNACE ATTACHMENT Filed Aug. 4', 1923 2 Sheets-Sheet 1 IN VEN TOR ckmmsD 032L521 ATTORNE};

March 24, 1925. {531,126

. J. D. OBRIEN FURNACE ATTACHMENT Filed Aug. 4, 1925 2 Shee ts-Sheet 2 v INVENTOR' 62151290615 RZE'N H BY g ATiORNEY Patented Mar. 24, 1925.

UNI ED STATES PATENT. OFFICE.

JAMES D. onnxnn, on BROOKLYN, new Yon-ii.

FURNACE ATTAGHMENT.

Application filed August 4., 1923. Serial no. 855582.

.7 '0 all who-m 2'25 may concern:

Be it known that I, JAIYIES D. OBnmn, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Furnace Attachments, of which the following is a full, clear, under:- act description. 3

This invention relates to improvements in furnace attachments and was primarily designed fdr use with boiler room furnaces.

The general objectof this inventionis the provision of means for collecting and quenching unburnedfuel, that is generally conveyed away with the. ashes and escaping gases,so that it may be introduced into the furnace again. I

This object is accomplished by mounting at the end of the grate means for. scraping the ash bed to remove the fuel therefrom, mounting in conjunctionwith said: fuel removing means an extinguisher for receiving the fuel and quenching it, and providing in conjunction with the extinguisher means for removing the quenched fuel therefrom.

This and other objects of the invention will be more clearly understood from the following detailed description and accompanying drawings.. 7 I

Figure '1 is a vertical section through a furnace showing the furnace attachment in position; I

Figure 2' is a vertical section along the line] 2-2, Figure 1, showingthe construction of the fire extinguisher;

Figure 3 is a top plan view of the furnace attachment. 1 Referring to the above-mentioned drawings, a furnace 10 of any well known construction provided with a chain grate 11 is shown. A. fuel feeder 12 is provided for supplying'fuel 13 to the chain grate 11. At

container 16 is carried by a plate 17 built P0sitioned in the ends ofthe container 16 are into the rear wall 15 of the-furnace.

bridges 18 providing slides leading from the bottom of the container to notches 19 tain'er provided in the ends of the container 16.

An endless chain 20 extends longitudinally of the container 16 and is carried by the chaln wheels 21 and 22 mounted outside of the furnace. The chain wheel 22 is driven by a. motor 23 and the chain travels through i in conjunction with the chain wheels 21 and 22. respectively, is associated with the con- 13. The fuel remover 28 is provided with a forward edge which is'curved to rest on the upper edge of the container '16. Extending through the inner edge of the fuel remover 28 is a .pipe 29 which joins the hollow shaft 27 at 30, establishing a cooling, circuit for the fuel remover 30 at). 29 through a flexible tube 31 so that the prongs may he moved freely upon-the rotation of the hollow shaft 27. Mounted on one end of. the shaft 27 is a crank 32 for operating it. Connected with the hollow shaft 27 is a pipe 33 leading. into the container 16. A valve 3 1 is mounted in the pipe 33 to control the flow of the cooling fluid from the cooling circuit. The cooling fluid supplied to the pipe29 is allowed to flow into the container 16 to act as a quenching fluid 35, the level of which stands at approximately the bottom of the notches 19 in the ends of the container 16.

The operation of this device is as follows:

Then the chain grate 11 is in operation the fuel 13 is gradually carried rearward toward the furnace attachment. Generally some portions of the fuel burnmore rapidly than others and usually quite an amount of unburned fuel is dumped into the ash pit 14:. lVith the attachment described above, the edge 28 is set to plow through or scrape the ash bed before the ashes are dumped into the ash pit. Thus the fuel remover 28 picks from the ashes or receives from the grate the unburned pieces of fuel. fuel remover 28 delivers these unburned pieces of fuel to the container 16 which when supplied with the cooling fluid 35 forms an extinguisher or quencher for quenching the The cooling fluid is supplied to the pipe 3 This unburned fuel. This quenched fuel is drawn from the container 16 by the endless chain 20. After the fuel has been removed from the container 16 it may be fed onto the chain grate l1.

Sparks carried forward by the escaping gases usually strike the wall of the furnace and are dropped into the ash. pit. These sparks in passing down the wall of the furnace toward the ash pit drop into the container 16, are quenched, and finally are moved from the container 16 to be used as fuel.

The life of the fuel remover 28' is prolonged by the use of a cooling fluid circnlated through the pipe 29 and hollow shaft.

The pipe 29 also adds to tne strength of the fuel remover 28.

The thoroughness with which the ashes are sifted before they pass to the ash pit ll may be regulated to a certain ext t 0 s t-- ting the fuel remover 28. This setting of the fuel remover is controlled by the crank 32.

I would state in conclusion that while the illustrated example constitutes a practical embodiment of my invention 1 do not limit myself strictly to the exact details herein illustrated since manifestly the same can be considerably varied without departing from the spirit of the invention as defined in the appended claims.

Claims:

1. A furnace attachment for removing unburned fuel from the ashes discharged by a movable grate, comprising a coal remover presenting an edge to plow through the discharged ashes to engage the unburned pieces of fuel, a receiver for the unburned fuel passing over said coal. remover, said receiver having sides convergent at the bottom, a chain travelling in the angle presented'by the convergent sides of said receiver, and means to conduct water through said coal remover and. into said receiver.

2. In combination with a furnace pro vided with amovable chain grate, a receiver for the unburned fuel, said receiver spaced from said grate, an adjustable fuel remover presenting an edge for plowing through the discharged ashes to engage the unburned pieces of fuel, said fuel remover bridging the space between said grate and said re ceiver to pass the coal from the grate to the receiver, and. means to remove the coal from said receiver; together with means to conduct water through the coal remover to said receiver, said means adapted: to conform to the adjustments of saidcoal; remover.

JAMES D. OBRIEN. 

